@Override
        public Integer getIndexerWebfsUpdateIntervalAsInteger() {
            return 100;
        }

        @Override
        public Integer getIndexerWebfsMaxEmptyListCountAsInteger() {
            return maxEmptyListCount;
        }

        @Override
        public Integer getIndexerWebfsMaxDocumentCacheSizeAsInteger() {
            return 100;
        }

        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        final long updateInterval = fessConfig.getIndexerWebfsUpdateIntervalAsInteger().longValue();
        final int maxEmptyListCount = fessConfig.getIndexerWebfsMaxEmptyListCountAsInteger();
        final IntervalControlHelper intervalControlHelper = ComponentUtil.getIntervalControlHelper();
        try {
            final Consumer<SearchRequestBuilder> cb = builder -> {